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/** \file
* \brief This file contains wrappers for the DOM API
*
* \see https://dom.spec.whatwg.org/
*
* \author Copyright (C) 2021 Libor Polcak
*
* \license SPDX-License-Identifier: GPL-3.0-or-later
*/
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
//
/** \file
* \ingroup wrappers
*
* The events carry timestamp of their creation. As we allow wrapping of
* several ways to obtain timestamps, we need to provide the same precision
* for the Event API.
*/
(function() {
var remember_past_values = `var precision = args[0];
var doNoise = args[1];
var pastValues = {};
${rounding_function}
${noise_function}
var mitigationF = rounding_function;
if (doNoise === true){
mitigationF = function(value, precision) {
let params = [value, precision];
if (params in pastValues) {
return pastValues[params];
}
let result = noise_function(...params);
pastValues[params] = result;
return result;
}
}
`;
var wrappers = [
{
/**
* \see https://dom.spec.whatwg.org/#ref-for-dom-event-timestamp%E2%91%A0
*/
parent_object: "Event.prototype",
parent_object_property: "timeStamp",
wrapped_objects: [],
helping_code: remember_past_values + `let origGet = Object.getOwnPropertyDescriptor(Event.prototype, "timeStamp").get`,
post_wrapping_code: [
{
code_type: "object_properties",
parent_object: "Event.prototype",
parent_object_property: "timeStamp",
wrapped_objects: [],
/** \brief replaces Event.prototype.timeStamp getter to create
* a timestamp with the desired precision.
*/
wrapped_properties: [
{
property_name: "get",
property_value: `
function() {
return mitigationF(origGet.call(this), precision);
}`,
},
],
}
],
},
]
add_wrappers(wrappers);
})()
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